CN111346929A - Method and device for preventing strip steel from being broken and piled, cold rolling unit and storage medium - Google Patents
Method and device for preventing strip steel from being broken and piled, cold rolling unit and storage medium Download PDFInfo
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- CN111346929A CN111346929A CN202010142614.9A CN202010142614A CN111346929A CN 111346929 A CN111346929 A CN 111346929A CN 202010142614 A CN202010142614 A CN 202010142614A CN 111346929 A CN111346929 A CN 111346929A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/28—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B28/00—Maintaining rolls or rolling equipment in effective condition
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/06—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring tension or compression
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2271/00—Mill stand parameters
- B21B2271/02—Roll gap, screw-down position, draft position
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Abstract
The invention provides a method and a device for preventing strip steel from being broken and stacked, a cold rolling unit and a storage medium, wherein the method comprises the following steps: the method comprises the steps of obtaining target parameters of rolled strip steel, determining whether the rolled strip steel is broken or not based on the target parameters, controlling a tension roller of a cold rolling unit to be in an open state if the rolled strip steel is broken, and controlling roll gaps of working rollers of each rolling stand in the cold rolling unit to be opened to preset roll gap values so that the strip steel after the strip steel is broken normally runs. According to the scheme, after strip steel breakage is detected, the strip steel can be smoothly conveyed by opening the tension roller and opening the roll gaps of the working rollers of the rolling stands, steel piling of the strip steel after the strip steel breakage among the rolling stands is avoided, damage of the strip steel after the strip steel breakage to equipment in a rolling mill area is reduced, and the production efficiency of a production line is improved.
Description
Technical Field
The invention relates to the technical field of cold rolling, in particular to a method and a device for preventing strip steel from being broken and piled, a cold rolling unit and a storage medium.
Background
In the process of producing the strip steel by the cold rolling production line, if strip breakage occurs, the strip steel after the strip breakage can be accumulated between racks of all rolling mills to form steel heaps. The broken strip may be caused by the reasons of quality defect of hot rolling raw materials, poor quality of welding seams, deviation of strip steel between frames, unreasonable technological parameters and the like. If strip breakage and steel stacking occur, equipment in a rolling mill area, such as a velocimeter, a thickness gauge and the like, can be damaged, and in addition, the accident handling difficulty and the handling time can be further increased when the steel stacking of the strip steel on the rolling mill frame part is serious, so that the production efficiency and the production cost of a production line are influenced.
Disclosure of Invention
The embodiment of the specification provides a method and a device for preventing strip breakage and steel stacking of strip steel, a cold rolling unit and a storage medium.
In a first aspect, the present invention provides a method for preventing strip breakage and steel stacking in a cold rolling mill group, wherein the cold rolling mill group comprises a rolling mill group and a tension roller at an inlet of the rolling mill group, and the method comprises:
acquiring target parameters of the cold rolling unit in the process of rolling the strip steel;
determining whether strip steel rolled by the cold rolling unit has strip breakage or not based on the target parameters;
and if the strip steel rolled by the cold rolling unit is broken, controlling the tension roller to be in an open state and controlling the roll gap of the working roller of each rolling stand in the rolling unit to be opened to a preset roll gap value so as to ensure that the strip steel after the strip is broken normally runs.
Optionally, the acquiring target parameters of the strip steel rolled by the cold rolling mill group includes:
acquiring the strip steel tension between rolling stands in the rolling mill group and acquiring the strip steel running speed of the last stand in the rolling mill group;
the step of determining whether the strip steel rolled by the cold rolling unit has strip breakage or not based on the target parameters comprises the following steps:
determining whether the strip steel running speed of the last frame meets a preset speed range;
if the strip steel running speed of the last stand meets the preset speed range, determining whether the strip steel tension between the rolling stands continuously meets the preset tension range within a preset time length;
and if the strip steel tension between the rolling mill frames continuously meets the preset tension range within the preset time, determining that the strip steel rolled by the cold rolling mill group is broken.
Optionally, before determining whether the strip steel running speed of the last stand meets a preset speed range, the method further comprises:
acquiring target strip steel parameters of the strip steel rolled by the cold rolling unit;
and determining a preset speed range corresponding to the target strip steel parameter according to the corresponding relation between the strip steel parameter and the speed range.
Optionally, the controlling the roll gap opening of the work rolls of each rolling stand in the rolling mill group to a preset roll gap value includes:
controlling the roll gap of a working roll of a final frame in the rolling unit to be opened to a first preset roll gap value;
and controlling the working roll gaps of other frames except the last frame in the rolling unit to be opened to a second preset roll gap value, wherein the first preset roll gap value is smaller than the second preset roll gap value.
Optionally, a ratio between the first preset roll gap value and the second preset roll gap value ranges from 30% to 50%.
In a second aspect, the present specification provides an apparatus for preventing strip breakage and steel stacking, which is applied to a cold rolling mill group, wherein the cold rolling mill group comprises a rolling mill group and a tension roller located at an inlet of the rolling mill group, the apparatus includes:
the acquisition module is used for acquiring target parameters in the process of rolling the strip steel by the cold rolling unit;
the strip steel breakage determining module is used for determining whether strip steel rolled by the cold rolling unit has breakage or not based on the target parameters;
and the control module is used for controlling the tension roller to be in an open state and controlling the roll gap of the working roller of each rolling stand in the rolling unit to be opened to a preset roll gap value if the strip steel rolled by the cold rolling unit is broken so as to ensure that the strip steel after the strip breaking normally runs.
Optionally, the obtaining module is configured to:
acquiring the strip steel tension between rolling stands in the rolling mill group and acquiring the strip steel running speed of the last stand in the rolling mill group;
the strip steel breakage determination module is used for:
determining whether the strip steel running speed of the last frame meets a preset speed range;
if the strip steel running speed of the last stand meets the preset speed range, determining whether the strip steel tension between the rolling stands continuously meets the preset tension range within a preset time length;
and if the strip steel tension between the rolling mill frames continuously meets the preset tension range within the preset time, determining that the strip steel rolled by the cold rolling mill group is broken.
Optionally, the apparatus further comprises:
the strip steel parameter acquisition module is used for acquiring target strip steel parameters of strip steel rolled by the cold rolling unit;
and the speed range determining module is used for determining a preset speed range corresponding to the target strip steel parameter according to the corresponding relation between the strip steel parameter and the speed range.
Optionally, the control module is configured to:
controlling the roll gap of a working roll of a final frame in the rolling unit to be opened to a first preset roll gap value;
and controlling the roll gaps of the working rolls of other frames except the last frame in the rolling unit to be opened to a second preset roll gap value, wherein the first preset roll gap value is smaller than the second preset roll gap value.
Optionally, a ratio between the first preset roll gap value and the second preset roll gap value ranges from 30% to 50%.
In a third aspect, embodiments of the present description provide a cold rolling mill train, comprising:
the device comprises a rolling unit, a tension roller positioned at the inlet of the rolling unit, a parameter measuring device arranged in the rolling unit area and a controller;
the parameter measuring equipment is used for acquiring target parameters in the process of rolling the strip steel by the cold rolling unit and sending the target parameters to the controller;
the controller is used for determining whether strip steel rolled by the cold rolling unit has strip breakage or not based on the target parameters; if the band steel rolled by the cold rolling unit is broken, the controller is used for controlling the tension roller to be in an open state and controlling the roll gap of the working roller of each rolling stand in the rolling unit to be opened to a preset roll gap value so as to enable the band steel after the band is broken to normally run.
In a fourth aspect, the present specification provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of any of the above methods.
The beneficial effects of the embodiment of the specification are as follows:
in the technical scheme of the embodiment of the invention, in the process of rolling the strip steel by the cold rolling unit, the target parameter of the rolled strip steel is obtained, whether the rolled strip steel is broken is determined based on the target parameter, if the rolled strip steel is broken, the tension roller of the cold rolling unit is controlled to be in an open state, and the roll gap of the working roller of each rolling stand in the cold rolling unit is controlled to be opened to a preset roll gap value, so that the strip steel after the strip is broken normally operates. According to the scheme, after strip steel breakage is detected, the strip steel can be smoothly conveyed by opening the tension roller and opening the roll gaps of the working rollers of the rolling stands, steel piling of the strip steel after the strip steel breakage among the rolling stands is avoided, damage of the strip steel after the strip steel breakage to equipment in a rolling mill area is reduced, and the production efficiency of a production line is improved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the specification. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a flow chart of a method for preventing strip breakage and steel stacking of strip steel provided by a first aspect of the present application;
FIG. 2 is a flow chart of another method for preventing strip breakage and steel stacking provided by the application;
fig. 3 is a schematic diagram of an apparatus for preventing strip breakage and steel stacking according to a second aspect of the present application.
Detailed Description
The embodiment of the invention provides a method and a device for preventing strip steel from being broken and piled, a cold rolling unit and a storage medium, which are used for realizing the normal operation of the strip steel after the strip is broken and avoiding the piling of the steel. The method is applied to a cold rolling mill group, the cold rolling mill group comprises a rolling mill group and a tension roller positioned at the inlet of the rolling mill group, and the method comprises the following steps: acquiring target parameters of the cold rolling unit in the process of rolling the strip steel; determining whether strip steel rolled by the cold rolling unit has strip breakage or not based on the target parameters; and if the strip steel rolled by the cold rolling unit is broken, controlling the tension roller to be in an open state and controlling the roll gap of the working roller of each rolling stand in the rolling unit to be opened to a preset roll gap value so as to ensure that the strip steel after the strip is broken normally runs.
The technical solutions of the present invention are described in detail below with reference to the drawings and specific embodiments, and it should be understood that the specific features in the embodiments and examples of the present invention are described in detail in the technical solutions of the present application, and are not limited to the technical solutions of the present application, and the technical features in the embodiments and examples of the present application may be combined with each other without conflict.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In a first aspect, the present invention provides a method for preventing strip breakage and steel piling in a cold rolling mill train, the cold rolling mill train including a rolling mill train and tension rolls at an entrance of the rolling mill train, the rolling mill train including a plurality of rolling mills, each rolling mill including a mill stand and work rolls disposed on the mill stand. It should be understood that the type of tension roller can be selected according to actual needs, such as a three-roller tension roller. The number of rolling mills included in the rolling mill group can be set according to actual needs, in the embodiment of the present specification, the rolling mill group includes five rolling mills, the number of work rolls provided on each rolling mill stand can also be set according to actual needs, and the number is not limited here.
As shown in fig. 1, a flowchart of a method for preventing strip breakage and steel stacking for an embodiment of the present specification is provided, where the method includes the following steps:
step S11: acquiring target parameters of the cold rolling unit in the process of rolling the strip steel;
step S12: determining whether strip steel rolled by the cold rolling unit has strip breakage or not based on the target parameters;
step S13: and if the strip steel rolled by the cold rolling unit is broken, controlling the tension roller to be in an open state and controlling the roll gap of the working roller of each rolling stand in the rolling unit to be opened to a preset roll gap value so as to ensure that the strip steel after the strip is broken normally runs.
In step S11, the cold rolling mill train may be a train rolling a strip on a sour mill line, such as a five stand six roll sour mill production train. The target parameters may include, but are not limited to, rolling parameters of the cold mill train rolling the strip, strip parameters. The target parameters can be obtained by a measuring instrument arranged in the cold rolling unit, and also can be obtained by reading preset rolling parameters. The target parameters are used for judging whether the strip steel is broken, the number of the target parameters can be one or more, and for example, the target parameters can comprise strip steel tension between racks, strip steel speed and other parameters.
In step S12, determining whether the rolled strip steel has a broken strip based on the target parameters may be implemented in various ways, for example, to determine whether the strip steel has a broken strip, a strip steel broken parameter range may be preset, where the strip steel broken parameter range includes a parameter range corresponding to each target parameter, and if each acquired target parameter satisfies the preset strip steel broken parameter range, it is determined that the strip steel has a broken strip. Or, the judgment condition of strip steel breakage may be preset, for example, the preset strip steel breakage judgment includes a plurality of judgment conditions, whether the target parameter meets each judgment condition is judged in sequence according to the priority or the sequence of the plurality of judgment conditions, and if the target parameter meets each judgment condition, strip steel breakage is determined. Of course, the determination of the strip break may be performed in other ways, which are not illustrated here.
In step S13, if it is detected that the strip is broken, and if the strip is not processed, the strip is further stacked on the frame member, so in order to avoid the occurrence of the stacked steel, in the embodiment of the present disclosure, the strip after the strip is broken is ensured to smoothly advance through step S13 until the strip after the strip is broken is taken out. Due to the fact that the strip steel deviates or warps upwards after being broken, if the working rolls of the rolling mill frame keep a rolling state in a normal rolling mode, roll gaps between the working rolls are small, and the strip steel after being broken cannot penetrate through the closed roll gaps. Therefore, in the embodiment of the specification, after the strip breakage is detected, the roll gaps of the working rolls of the frames are opened to the preset roll gap value, and the tension rolls are controlled to be in the open state, so that the strip steel after the strip breakage can smoothly move forward.
It should be noted that, when the cold rolling mill train is in normal rolling production, the tension roller is in the closed state, thereby forms the tension of rolling mill entry, guarantees the strip steel steady operation state, and the tension roller compresses tightly the state and is controlled through the pneumatic cylinder, and when appearing disconnected area, control tension roller opens, can pass through the piston rod of control pneumatic cylinder in the recovery state to the complete withdrawal state from the deep state. In addition, when the roll gap of the working roll of each rolling stand is controlled to be opened, the preset roll gap value can be set according to actual needs, the opening degree of the roll gap of the official roll of each rolling stand can be the same or different, that is, the preset roll gap value corresponding to each rolling stand can be the same or different, and is not limited herein.
In a specific implementation process, in an embodiment of this specification, the obtaining target parameters of the strip steel rolled by the cold rolling mill group includes: acquiring the strip steel tension between rolling stands in the rolling mill group and acquiring the strip steel running speed of the last stand in the rolling mill group; the step of determining whether the strip steel rolled by the cold rolling unit has strip breakage or not based on the target parameters comprises the following steps: determining whether the strip steel running speed of the last frame meets a preset speed range; if the strip steel running speed of the last stand meets the preset speed range, determining whether the strip steel tension between the rolling stands continuously meets the preset tension range within a preset time length; and if the strip steel tension between the rolling mill frames continuously meets the preset tension range within the preset time, determining that the strip steel rolled by the cold rolling mill group is broken.
Specifically, in the embodiment, whether the strip breaks can be judged according to the strip tension between the frames and the strip running speed of the last frame. The strip steel tension between the rolling mill frames can be detected through a tension meter roller, namely, a pressure sensor inside the roller, and the strip steel running speed of the last frame can be obtained through a velocimeter. When judging whether strip steel is broken or not, firstly judging whether the running speed of the strip steel of the last stand meets a preset speed range or not, wherein the preset speed range can be set according to actual needs. For example, if the preset speed range is greater than or equal to 500m/min, it is determined whether the strip steel running speed of the last stand is greater than or equal to 500m/mim, and if so, it is continuously determined whether the strip steel tension continuously satisfies the preset tension range within a preset time period. The preset time and the preset tension range can also be set according to actual needs, for example, the preset time is 0.5s, the preset tension range is less than or equal to 10KN, and if the strip tension is less than or equal to 10KN and the strip tension less than or equal to 10KN is maintained for more than 0.5s, it indicates that the strip is broken.
In the process, the strip steel tension between the frames can be the strip steel tension between any two adjacent frames or the strip steel tension between the specified frames. In one embodiment, taking a five-stand rolling mill group as an example, the strip steel tension between every two adjacent stands can be obtained, four strip steel tensions are obtained in total, the judging process is executed for each strip steel tension, and if one or more strip steel tensions meet the judging condition, strip breakage is determined.
In the embodiment of the specification, because the damage degree of the strip breakage accidents of the strip steels with different strengths, widths and thicknesses at different speeds is different, if the strength of the strip steel is higher, the thickness of the strip steel is thinner and the width of the strip steel is wider, the damage of the accidents possibly caused is more serious, and the processing time is longer. Therefore, different preset speed ranges can be set for the strip steels of different steel types or specifications according to the influence degree of production accidents, for example, for the strip steel with high strength and wider thickness, the lower limit of the preset speed range can be set to be any value in 300-400 m/min, for example, the lower limit of the preset speed range can be set to be any value in 700-800 m/min, for the common products, the speed limit condition can be set to be higher, for example, the lower limit of the preset speed range can be set to be any value in 700-800 m/min. Therefore, for the strip steels of different steel types or specifications, the corresponding strip breakage judgment conditions also have differences, and the strip breakage judgment of the strip steels can be more reasonably and flexibly carried out. Therefore, in this embodiment of the present disclosure, before determining whether the strip operation speed of the last stand satisfies the preset speed range, the method further includes: acquiring target strip steel parameters of the strip steel rolled by the cold rolling unit; and determining a preset speed range corresponding to the target strip steel parameter according to the corresponding relation between the strip steel parameter and the speed range.
In the specific implementation process, the target strip steel parameter can be one or more of the parameters of the strength, the width, the thickness and the like of the produced strip steel, and different speed ranges can be set based on different strip steel parameters. And associating different strip steel parameters and corresponding speed ranges to generate a corresponding relation between the strip steel parameters and the speed ranges. When the strip steel is judged to be broken, the corresponding preset speed range can be determined in the corresponding relation according to the obtained target strip steel parameters, so that the strip breakage judgment is carried out.
In the embodiment of the specification, when strip breakage is detected and the working roll gaps of the rolling stands are opened, the following modes can be adopted: controlling the roll gap of a working roll of a final frame in the rolling unit to be opened to a first preset roll gap value; and controlling the roll gaps of the working rolls of other frames except the last frame in the rolling unit to be opened to a second preset roll gap value, wherein the first preset roll gap value is smaller than the second preset roll gap value.
In the specific implementation process, when the roll gaps of the working rolls of all the rolling stands are opened, the oil pressure of hydraulic cylinders of the roll gaps can be controlled to directly carry out overflow unloading treatment. Taking a five-stand rolling mill group as an example, when the working roll gaps of all stands are opened, the working roll gaps of the first four rolling stands are all opened to a second preset roll gap value, and the working roll gap of the last rolling stand is opened to a first preset roll gap value, wherein the first preset roll gap value is smaller than the second preset roll gap value. The roll gap opening degree of the front four frames is larger so as to ensure that strip steel can pass through smoothly, and the roll gap opening degree of the last frame is smaller because the strip steel speed is reduced and becomes slower, so that the strip steel can pass through the roll gap. If the roll gap of the last stand is also opened to a larger extent as the front four stands, the strip may pass out of the rolling mill into the rear coiling area, causing secondary accidents.
In the embodiment of the present disclosure, the first preset roll gap value and the second preset roll gap value may be set according to actual needs, for example, a ratio between the first preset roll gap value and the second preset roll gap value ranges from 30% to 50%. In one embodiment, the roll gap of the first four stands is opened to 50mm, and the roll gap of the last stand is opened to 30% of the roll gap opening of the preceding stand, i.e., the second preset roll gap value is 50mm and the first preset roll gap value is 15 mm.
In order to better understand the method for preventing strip breakage and steel stacking provided in the embodiments of the present specification, please refer to fig. 2, fig. 2 is a flow chart for preventing strip breakage and steel stacking, in fig. 2, parameters in the rolling process of a cold rolling mill set are firstly read online, in the embodiment, the parameters include the strip running speed of the last stand and the strip tension between the rolling stands; next, a speed determination is performed: judging the speed of the strip steel at the outlet of the rolling mill, namely whether the running speed of the strip steel of the last stand is more than or equal to 500m/min, if not, ending the process, if so, judging the tension: and judging whether the strip steel tension between the rolling mill frames is lower than 10KN or not, wherein the duration time is longer than 0.5s, if not, ending the process, if so, indicating that the strip is broken, opening a three-roller tension roller at the inlet of the rolling mill, automatically and quickly opening the roll gap of the working rollers of the frames, except the last frame, positioned in the front of the rolling mill group to 50mm, and automatically and quickly opening the roll gap of the working roller of the last frame to 15 mm. In the embodiment of the specification, when strip steel breakage is judged, the judgment result of the strip steel breakage can be represented through the pulse signal, and in addition, the opening of the roll gap of the working roll of the rolling mill frame can be controlled through the pulse signal.
In summary, the method for preventing strip steel from being piled up after strip steel is broken provided in the embodiments of the present specification, when strip steel is broken, the roll gap of the working roll of the rolling mill frame is quickly opened, and strip steel piling between frames is effectively prevented, so that the accident occurrence rate is reduced, the accident handling time is reduced, and the strip breaking speed is set by combining the influence degree of production accidents and the equipment type, so that the judgment of strip steel breaking is more reasonable. The method provided by the embodiment of the specification is implemented on site, the accident influence degree of a certain acid continuous rolling mill unit caused by strip steel breakage and steel piling between racks is effectively reduced, the average strip breakage processing time of each time is reduced from 86 minutes to 45 minutes, and a remarkable application effect is achieved. In addition, the calibration maintenance frequency of key equipment in the rolling mill area is reduced to 4 times from 12 times per year, and the equipment maintenance cost is greatly reduced.
In a second aspect, the present specification provides an apparatus for preventing strip breakage and steel stacking for a cold rolling mill train, the cold rolling mill train includes a rolling mill train and a tension roller located at an inlet of the rolling mill train, as shown in fig. 3, the apparatus includes:
the acquisition module 31 is used for acquiring target parameters in the process of rolling the strip steel by the cold rolling unit;
the strip steel breakage determination module 32 is used for determining whether strip steel rolled by the cold rolling unit has breakage or not based on the target parameters;
and the control module 33 is used for controlling the tension roller to be in an open state and controlling the roll gap of the working roller of each rolling stand in the rolling unit to be opened to a preset roll gap value if the strip steel rolled by the cold rolling unit is broken so as to ensure that the strip steel after the strip breaking normally runs.
Optionally, the obtaining module 31 is configured to:
acquiring the strip steel tension between rolling stands in the rolling mill group and acquiring the strip steel running speed of the last stand in the rolling mill group;
a strip break determination module 32 configured to:
determining whether the strip steel running speed of the last frame meets a preset speed range;
if the strip steel running speed of the last stand meets the preset speed range, determining whether the strip steel tension between the rolling stands continuously meets the preset tension range within a preset time length;
and if the strip steel tension between the rolling mill frames continuously meets the preset tension range within the preset time, determining that the strip steel rolled by the cold rolling mill group is broken.
Optionally, the apparatus further comprises:
the strip steel parameter acquisition module is used for acquiring target strip steel parameters of strip steel rolled by the cold rolling unit;
and the speed range determining module is used for determining a preset speed range corresponding to the target strip steel parameter according to the corresponding relation between the strip steel parameter and the speed range.
Optionally, a control module 33, configured to:
controlling the roll gap of a working roll of a final frame in the rolling unit to be opened to a first preset roll gap value;
and controlling the roll gaps of the working rolls of other frames except the last frame in the rolling unit to be opened to a second preset roll gap value, wherein the first preset roll gap value is smaller than the second preset roll gap value.
Optionally, a ratio between the first preset roll gap value and the second preset roll gap value ranges from 30% to 50%.
With regard to the above-mentioned apparatus, the specific functions of the respective modules have been described in detail in the embodiments of the method for preventing strip breakage and steel stacking provided in the embodiments of the present specification, and will not be described in detail herein.
In a third aspect, based on the same inventive concept as the method for preventing strip breakage and steel stacking in the foregoing embodiment, the present invention further provides a cold rolling mill train, including:
the device comprises a rolling unit, a tension roller positioned at the inlet of the rolling unit, a parameter measuring device arranged in the rolling unit area and a controller;
the parameter measuring equipment is used for acquiring target parameters in the process of rolling the strip steel by the cold rolling unit and sending the target parameters to the controller;
the controller is used for determining whether strip steel rolled by the cold rolling unit has strip breakage or not based on the target parameters; if the band steel rolled by the cold rolling unit is broken, the controller is used for controlling the tension roller to be in an open state and controlling the roll gap of the working roller of each rolling stand in the rolling unit to be opened to a preset roll gap value so as to enable the band steel after the band is broken to normally run.
In the embodiments of the present disclosure, the parameter measuring device may include a velocimeter, a thickness gauge, and other instruments.
In the embodiment of the present disclosure, the cold rolling mill train may further include a memory, and a computer program that is stored in the memory and is executable on the controller, and when the controller executes the computer program, the steps of the method for preventing strip breakage and steel stacking provided by the embodiment of the present disclosure are implemented.
In a fourth aspect, based on the same inventive concept as the method for preventing strip breakage and steel stacking in the foregoing embodiments, the present invention further provides a computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, implements the steps of any one of the foregoing methods for preventing strip breakage and steel stacking.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A method for preventing strip steel from being broken and piled is applied to a cold rolling unit, the cold rolling unit comprises a rolling unit and a tension roller positioned at the inlet of the rolling unit, and the method is characterized by comprising the following steps:
acquiring target parameters of the cold rolling unit in the process of rolling the strip steel;
determining whether strip steel rolled by the cold rolling unit has strip breakage or not based on the target parameters;
and if the strip steel rolled by the cold rolling unit is broken, controlling the tension roller to be in an open state and controlling the roll gap of the working roller of each rolling stand in the rolling unit to be opened to a preset roll gap value so as to ensure that the strip steel after the strip is broken normally runs.
2. The method of claim 1, wherein said obtaining target parameters for rolling a strip by said cold rolling mill comprises:
acquiring the strip steel tension between rolling stands in the rolling mill group and acquiring the strip steel running speed of the last stand in the rolling mill group;
the step of determining whether the strip steel rolled by the cold rolling unit has strip breakage or not based on the target parameters comprises the following steps:
determining whether the strip steel running speed of the last frame meets a preset speed range;
if the strip steel running speed of the last stand meets the preset speed range, determining whether the strip steel tension between the rolling stands continuously meets the preset tension range within a preset time length;
and if the strip steel tension between the rolling mill frames continuously meets the preset tension range within the preset time, determining that the strip steel rolled by the cold rolling mill group is broken.
3. The method of claim 2, wherein prior to determining whether the strip running speed of the final stand satisfies a preset speed range, the method further comprises:
acquiring target strip steel parameters of the strip steel rolled by the cold rolling unit;
and determining a preset speed range corresponding to the target strip steel parameter according to the corresponding relation between the strip steel parameter and the speed range.
4. The method of claim 1, wherein said controlling the roll gap opening of the work rolls of each roll stand in the mill train to a preset roll gap value comprises:
controlling the roll gap of a working roll of a final frame in the rolling unit to be opened to a first preset roll gap value;
and controlling the roll gaps of the working rolls of other frames except the last frame in the rolling unit to be opened to a second preset roll gap value, wherein the first preset roll gap value is smaller than the second preset roll gap value.
5. The method of claim 4, wherein the ratio between the first predetermined roll gap value and the second predetermined roll gap value ranges from 30% to 50%.
6. The utility model provides a prevent belted steel strip breakage and pile steel device, is applied to in the cold rolling mill group, the cold rolling mill group includes the rolling mill group and is located the tension roll of rolling mill group entrance, its characterized in that, the device includes:
the acquisition module is used for acquiring target parameters in the process of rolling the strip steel by the cold rolling unit;
the strip steel breakage determining module is used for determining whether strip steel rolled by the cold rolling unit has breakage or not based on the target parameters;
and the control module is used for controlling the tension roller to be in an open state and controlling the roll gap of the working roller of each rolling stand in the rolling unit to be opened to a preset roll gap value if the strip steel rolled by the cold rolling unit is broken so as to ensure that the strip steel after the strip breaking normally runs.
7. The apparatus of claim 6, wherein the obtaining module is configured to:
acquiring the strip steel tension between rolling stands in the rolling mill group and acquiring the strip steel running speed of the last stand in the rolling mill group;
the strip steel breakage determination module is used for:
determining whether the strip steel running speed of the last frame meets a preset speed range;
if the strip steel running speed of the last stand meets the preset speed range, determining whether the strip steel tension between the rolling stands continuously meets the preset tension range within a preset time length;
and if the strip steel tension between the rolling mill frames continuously meets the preset tension range within the preset time, determining that the strip steel rolled by the cold rolling mill group is broken.
8. The apparatus of claim 6, wherein the control module is configured to:
controlling the roll gap of a working roll of a final frame in the rolling unit to be opened to a first preset roll gap value;
and controlling the roll gaps of the working rolls of other frames except the last frame in the rolling unit to be opened to a second preset roll gap value, wherein the first preset roll gap value is smaller than the second preset roll gap value.
9. A cold rolling mill train, characterized in that the cold rolling mill train comprises:
the device comprises a rolling unit, a tension roller positioned at the inlet of the rolling unit, a parameter measuring device arranged in the rolling unit area and a controller;
the parameter measuring equipment is used for acquiring target parameters in the process of rolling the strip steel by the cold rolling unit and sending the target parameters to the controller;
the controller is used for determining whether strip steel rolled by the cold rolling unit has strip breakage or not based on the target parameters; if the band steel rolled by the cold rolling unit is broken, the controller is used for controlling the tension roller to be in an open state and controlling the roll gap of the working roller of each rolling stand in the rolling unit to be opened to a preset roll gap value so as to enable the band steel after the band is broken to normally run.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 5.
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| CN202010142614.9A CN111346929A (en) | 2020-03-04 | 2020-03-04 | Method and device for preventing strip steel from being broken and piled, cold rolling unit and storage medium |
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| CN112934982A (en) * | 2021-03-24 | 2021-06-11 | 首钢长治钢铁有限公司 | Rolling tension adjusting method of rolling mill set and related equipment |
| CN113118210A (en) * | 2021-04-21 | 2021-07-16 | 新余钢铁股份有限公司 | Rolling breakage preventing system for continuous rolling of high-carbon steel and control method thereof |
| CN113210438A (en) * | 2021-05-20 | 2021-08-06 | 广西北港不锈钢有限公司 | High-speed rolling method of stainless steel cold-rolled sheet |
| CN113290064A (en) * | 2021-05-20 | 2021-08-24 | 马鞍山钢铁股份有限公司 | Method for reducing deviation and belt breakage of cold continuous rolling mill |
| CN113305154A (en) * | 2021-04-29 | 2021-08-27 | 首钢京唐钢铁联合有限责任公司 | Roll shifting control method and device, rolling mill set and storage medium |
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